What’s Vulnerable › Vulnerabilities

CVE-2021-27181

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-14 · updated 2026-06-17
• Weakness: CWE-352

Description

An issue was discovered in MDaemon before 20.0.4. Remote Administration allows an attacker to perform a fixation of the anti-CSRF token. In order to exploit this issue, the user has to click on a malicious URL provided by the attacker and successfully authenticate into the application. Having the value of the anti-CSRF token, the attacker may trick the user into visiting his malicious page and performing any request with the privileges of attacked user.

Affected products

• Altn Mdaemon: before 20.0.4 — fixed in 20.0.4

How to fix

Upgrade to a fixed version: Altn Mdaemon 20.0.4. Check the vendor advisory for mitigations.

References

• https://github.com/chudyPB/MDaemon-Advisories
• https://www.altn.com/Support/SecurityUpdate/MD011221_MDaemon_EN/
• https://github.com/chudyPB/MDaemon-Advisories
• https://www.altn.com/Support/SecurityUpdate/MD011221_MDaemon_EN/

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